In queuing systems with multiple queues, customers switch lines if they perceive another to be moving faster. This kind of behavior is called ________

Computerized checkouts are generally used in conjunction with _____

a. electronic article surveillance b. quick response inventory management c. logistics systems d. UPC-based systems

Which of the following pollutants causes poor coordination and lack of alertness?

A) lead B) nitrogen oxide C) carbon monoxide D) sulfur dioxide